Air conditioning system, air conditioner and control method of air conditioner

Abstract

The invention discloses an air-conditioning system, an air conditioner and a control method thereof, a refrigerant flow path and a water flow path are formed on the air-conditioning system, a cold flow control part and a first indoor heat exchanger are arranged on the refrigerant flow path, a water flow control part and a second indoor heat exchanger are arranged on the water flow path, the air-conditioning system has a self-cleaning mode, and in the self-cleaning mode, the cold flow control part is connected with the first indoor heat exchanger. The water flow control component controls flowing of the water flow path so as to empty water in the second indoor heat exchanger, and the cold flow control component controls flowing of the refrigerant flow path so that a refrigerant can enter the first indoor heat exchanger in a liquid state and radiate cold energy to the second indoor heat exchanger. The first indoor heat exchanger and the second indoor heat exchanger are connected through the cold flow control component, water in the second indoor heat exchanger is emptied before the first indoor heat exchanger and the second indoor heat exchanger are frosted, and a liquid refrigerant is input into the first indoor heat exchanger through the cold flow control component, so that the first indoor heat exchanger and the second indoor heat exchanger are frosted, and the first indoor heat exchanger and the second indoor heat exchanger are self-cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning system, an air conditioner and a control method thereof. Background Art

[0002] At present, since the heat exchange medium of dual-generation or tri-generation air-conditioning systems is water, if the indoor fan disk is cleaned according to the self-cleaning method of the indoor unit of the general fluorine system, the fan disk evaporator will be frozen or frosted, causing the water in the evaporator copper tube to freeze and easily crack the copper tube. Summary of the invention

[0003] The main purpose of the present invention is to provide an air conditioning system, an air conditioner and a control method thereof, aiming to solve the problem that the existing air conditioning system cannot be cleaned according to the self-cleaning of the fluorine system indoor unit.

[0004] To achieve the above object, the present invention provides an air conditioning system, wherein a refrigerant flow path and a water flow path are formed on the air conditioning system, a cold flow control component and a first indoor heat exchanger are provided on the refrigerant flow path, and a water flow control component and a second indoor heat exchanger are provided on the water flow path;

[0005] The air-conditioning system has a self-cleaning mode. In the self-cleaning mode, the water flow control component controls the flow of the water flow path to drain the water in the second indoor heat exchanger, and the cold flow control component controls the flow of the refrigerant flow path to allow the refrigerant to enter the first indoor heat exchanger in a liquid state and radiate cold to the second indoor heat exchanger.

[0006] Optionally, the refrigerant flow path includes a refrigerant circulation flow path, a gas side branch and a liquid side branch;

[0007] A compressor, a four-way valve, a condenser, a first throttling element, a second throttling element and a first plate heat exchanger are sequentially arranged on the refrigerant circulation flow path, the first plate heat exchanger has a first refrigerant port and a second refrigerant port, on the refrigerant circulation flow path, the first refrigerant port is located on a side of the second refrigerant port adjacent to the four-way valve, and the first plate heat exchanger is partially located on the water flow path;

[0008] One end of the gas-side branch is connected to the first refrigerant port of the first plate heat exchanger, and the other end is connected to one end of the first indoor heat exchanger;

[0009] One end of the liquid side branch is connected to the refrigerant circulation flow path and is located between the first throttling element and the second throttling element, and the other end is connected to the other end of the first indoor heat exchanger;

[0010] The cold flow control component includes the four-way valve, the first throttling element, and the second throttling element.

[0011] Optionally, a stop valve is provided on at least one of the gas side branch and the liquid side branch.

[0012] Optionally, a refrigerant radiator is also provided on the refrigerant circulation flow path to dissipate heat from the circuit board assembly.

[0013] Optionally, the air conditioning system further comprises a second plate heat exchanger, wherein the second plate heat exchanger is partially connected to the refrigerant circulation flow path and is located between the first throttling element and the second throttling element;

[0014] The refrigerant flow path includes an enthalpy injection branch, one end of which is connected to the refrigerant circulation flow path and is located between the second plate heat exchanger and the second throttling element, and the other end flows through the second plate heat exchanger and is connected to the enthalpy injection port of the compressor.

[0015] Optionally, the water flow control component includes a water pump and a switch valve arranged on the water flow path.

[0016] The present invention also provides an air conditioner, comprising the above-mentioned air conditioning system.

[0017] In addition, the present invention also provides a method for controlling an air conditioner, based on the above air conditioning system, characterized in that the method for controlling an air conditioner comprises the following steps:

[0018] Get the self-cleaning mode selected by the user;

[0019] In the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second indoor heat exchanger;

[0020] Controlling the cold flow control component to operate according to a first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a liquid state and radiate cold energy to the second indoor heat exchanger to form frost on the first indoor heat exchanger and the second indoor heat exchanger;

[0021] After the frosting completion condition is met, controlling the cold flow control component and / or the water flow control component to operate so as to defrost the first indoor heat exchanger and the second indoor heat exchanger;

[0022] After the defrosting completion condition is met, the self-cleaning mode is exited.

[0023] Optionally, the refrigerant flow path includes a refrigerant circulation flow path and a liquid side branch, a compressor, a four-way valve, a condenser, a first throttling element and a second throttling element are provided on the refrigerant circulation flow path, and the cold flow control component includes the four-way valve, the first throttling element and the second throttling element;

[0024] The step of controlling the cold flow control component to operate according to the first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a liquid state includes:

[0025] The four-way valve is controlled to switch the exhaust port of the compressor to connect to the condenser, the first throttling element is throttled, and the second throttling element is closed, so that the refrigerant can enter the liquid side branch in liquid state and enter into the first heat exchanger.

[0026] Optionally, controlling the cold flow control component and / or the water flow control component to operate so as to defrost the first indoor heat exchanger and the second indoor heat exchanger includes:

[0027] The cold flow control component is controlled to operate according to the second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a gaseous state to defrost the first indoor heat exchanger and the second indoor heat exchanger.

[0028] Optionally, the refrigerant flow path includes a refrigerant circulation flow path and a gas-side branch, a compressor, a four-way valve, a condenser, a first throttling element and a second throttling element are provided on the refrigerant circulation flow path, and the cold flow control component includes the four-way valve, the first throttling element and the second throttling element;

[0029] The step of controlling the cold flow control component to operate in a second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a gaseous state includes:

[0030] The four-way valve is controlled to switch the return air port of the compressor to connect to the condenser, the first throttling element is closed, and the second throttling element is opened, so that the refrigerant can enter the gas side branch in a gaseous state and enter into the first heat exchanger.

[0031] Optionally, the water flow control component includes a water pump and a switch valve provided on the water flow path;

[0032] The controlling the cold flow control component and / or the water flow control component to operate to defrost the first indoor heat exchanger and the second indoor heat exchanger includes:

[0033] The water pump is controlled to be turned on and the switch valve is controlled to be closed so that water flows through the second indoor heat exchanger to defrost the first indoor heat exchanger and the second indoor heat exchanger.

[0034] Optionally, before controlling the cold flow control component and / or the water flow control component to operate to defrost the first indoor heat exchanger and the second indoor heat exchanger, the method further includes:

[0035] The cold flow control component is controlled to be in the first refrigerant control state for a preset time to meet the frosting completion condition.

[0036] Optionally, the water flow control component includes a water pump and a switch valve provided on the water flow path;

[0037] The step of controlling the water flow control component to drain the water in the second indoor heat exchanger comprises:

[0038] The water pump is controlled to be closed and the switch valve is opened to drain the water in the second indoor heat exchanger.

[0039] In the technical solution of the present invention, when the first indoor heat exchanger and the second indoor heat exchanger need to be self-cleaned, the air-conditioning system controls the water flow control unit to operate so as to drain all the water in the second indoor heat exchanger to prevent the water in the second indoor heat exchanger from condensing into ice during subsequent frosting, and then controls the cold flow control unit to operate so as to input liquid refrigerant into the second indoor heat exchanger to radiate cold energy to the first indoor heat exchanger and the second indoor heat exchanger, so that the first indoor heat exchanger and the second indoor heat exchanger are frosted, so as to remove the frost on the first indoor heat exchanger and the second indoor heat exchanger. When melting, the melted water can take away the dust and other stains on the first indoor heat exchanger and the second indoor heat exchanger. In this way, the water in the second indoor heat exchanger can be drained through the water flow control component before the first indoor heat exchanger and the second indoor heat exchanger are frosted, and the liquid refrigerant can be input into the first indoor heat exchanger through the cold flow control component to make the first indoor heat exchanger and the second indoor heat exchanger frosted, so as to self-clean the first indoor heat exchanger and the second indoor heat exchanger, thereby solving the problem that the existing air-conditioning system cannot be cleaned according to the self-cleaning of the fluorine system indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of an embodiment of an air conditioning system provided by the present invention;

[0042] Figure 2 The three-dimensional structure diagram of the first indoor heat exchanger and the second indoor heat exchanger in the figure

[0043] Figure 3 for Figure 1 A schematic diagram of the structure of a control device for a hardware operating environment involved in the embodiment scheme;

[0044] Figure 4 This is a flow chart of a first embodiment of a method for controlling an air conditioner provided by the present invention.

[0045] Description of Figure Numbers:

[0046]

[0047]

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] At present, since the heat exchange medium of the dual-generation or tri-generation air-conditioning system is water, if the indoor fan disk is cleaned according to the self-cleaning method of the indoor unit of the general fluorine system, ice or frost will form on the evaporator of the fan disk, which will cause the water in the copper tube of the evaporator to freeze and easily crack the copper tube.

[0053] Based on this, the present invention provides an air conditioning system for an air conditioner, aiming to solve the problem that the existing air conditioning system cannot be cleaned according to the self-cleaning of the indoor unit of the fluorine system. Figure 1 to Figure 2 A schematic structural diagram of an embodiment of an air conditioning system provided by the present invention. Figure 3 A schematic diagram of the structure of a control device for a hardware operating environment involved in an embodiment of the present invention; Figure 4 A flow chart of a control method for an air conditioner is provided.

[0054] See also Figure 1 and Figure 2 A refrigerant flow path 1 and a water flow path 4 are formed on the air-conditioning system 100, a cold flow control component 3 and a first indoor heat exchanger 2 are provided on the refrigerant flow path 1, a water flow control component 6 and a second indoor heat exchanger 5 are provided on the water flow path 4, and the air-conditioning system 100 has a self-cleaning mode. In the self-cleaning mode, the water flow control component 6 controls the flow of the water flow path 4 to drain the water in the second indoor heat exchanger 5, and the cold flow control component 3 controls the flow of the refrigerant flow path 1 so that the refrigerant can enter the first indoor heat exchanger 2 in a liquid state and radiate cold to the second indoor heat exchanger 5.

[0055] In the technical solution of the present invention, when the first indoor heat exchanger 2 and the second indoor heat exchanger 5 need to be self-cleaned, the air-conditioning system 100 controls the water flow control unit to operate so as to completely drain the water in the second indoor heat exchanger 5 to prevent the water in the second indoor heat exchanger 5 from condensing into ice during subsequent frosting, and then controls the cold flow control unit 3 to operate so as to input liquid refrigerant into the second indoor heat exchanger 5 to radiate cold energy to the first indoor heat exchanger 2 and the second indoor heat exchanger 5, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to remove the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5. When melting, the melted water can take away the dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5. In this way, the water in the second indoor heat exchanger 5 is emptied through the water flow control component 6 before the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, and the liquid refrigerant is input into the first indoor heat exchanger 2 through the cold flow control component 3, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to self-clean the first indoor heat exchanger 2 and the second indoor heat exchanger 5, thereby solving the problem that the existing air conditioning system 100 cannot be cleaned according to the self-cleaning of the fluorine system indoor unit. It can be understood that there are many types of refrigerants, which can be freon, alkane, etc., and the present invention does not limit this.

[0056] It should be noted that, since the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are attached together, please refer to Figure 2 If the first indoor heat exchanger 2 is directly controlled to be cleaned according to the self-cleaning method of the existing fluorine system indoor unit, the water in the second indoor heat exchanger 5 is easily condensed into ice when frosting. For this reason, in the invention, the water flow control component 6 is used to drain the water in the second indoor heat exchanger 5 before frosting the first indoor heat exchanger 2 and the second indoor heat exchanger 5, and the liquid refrigerant is input into the first indoor heat exchanger 2 through the cold flow control component 3, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to self-clean the first indoor heat exchanger 2 and the second indoor heat exchanger 5, thereby solving the problem that the existing air-conditioning system 100 cannot be cleaned according to the self-cleaning method of the fluorine system indoor unit.

[0057] It should be understood that in order to control the actions of the cold flow control component 3 and the water flow control component 6, the air conditioning system 100 further includes a control device, see Figure 3 , the control device 3 may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0058] In one embodiment of the present invention, the refrigerant flow path 1 includes a refrigerant circulation flow path 11, an air side branch 12 and a liquid side branch 13. A compressor 111, a four-way valve 31, a condenser 112, a first throttling element 32, a second throttling element 33 and a first plate heat exchanger 113 are sequentially arranged on the refrigerant circulation flow path 11. The first plate heat exchanger 113 has a first refrigerant port and a second refrigerant port. On the refrigerant circulation flow path 11, the first refrigerant port is located on the side of the second refrigerant port adjacent to the four-way valve 31. The first plate heat exchanger 113 is partially located on the water flow path 4. One end of the air side branch 12 is connected to the first refrigerant port of the first plate heat exchanger 113, and the other end is connected to one end of the first indoor heat exchanger 2. One end of the liquid side branch 13 is connected to the refrigerant circulation flow path 11 and is located between the first throttling element 32 and the second throttling element 33. , and the other end is connected to the other end of the first indoor heat exchanger 2. The cold flow control component 3 includes the four-way valve 31, the first throttling element 32 and the second throttling element 33. In this way, by setting the liquid side branch 13, the liquid refrigerant after cooling is introduced into the first indoor heat exchanger 2, and the cold energy is radiated to the second indoor heat exchanger 5, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted. At the same time, by setting the gas side branch 12, the high-temperature gaseous refrigerant discharged by the compressor 111 is introduced into the first indoor heat exchanger to radiate heat to the second indoor heat exchanger 5, so that the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 is melted, and the melted water can take away the dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 complete self-cleaning.

[0059] Please note that Figure 1When the air-conditioning system 100 requires a circulation mode, the refrigerant flow path is: the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 111 first flows into the condenser 112 through the four-way valve 31 to convert the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure gaseous refrigerant, and then flows into the first throttling element 32 and the second throttling element 33 in sequence to convert the low-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant, and then flows into the first plate heat exchanger 113 to convert the low-temperature and low-pressure gaseous refrigerant into a medium-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 111 through the four-way valve 31 to convert the medium-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. When the air-conditioning system 100 needs to be frosted, the flow path of the refrigerant is: the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 111 first flows into the condenser 112 through the four-way valve 31 to convert the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure gas-liquid mixed refrigerant, and then flows into the first throttling element 32 to convert the low-temperature and high-pressure gas-liquid mixed refrigerant into a low-temperature and low-pressure liquid refrigerant, and then flows into the first indoor heat exchanger 2 to radiate cold energy to the second indoor heat exchanger 5, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted to convert the low-temperature and low-pressure liquid refrigerant into a medium-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 111 through the four-way valve 31 to convert the medium-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. When the air conditioning system 100 needs to defrost, the flow path of the refrigerant is as follows: the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 111 first flows into the first indoor heat exchanger 2 through the four-way valve 31 and the gas-side branch 12 to radiate heat to the second indoor heat exchanger 5, so that the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 melts into water, so as to convert the high-temperature and high-pressure gaseous refrigerant into medium-temperature and high-pressure gaseous refrigerant, and then flows into the first throttling element 32 through the liquid-side branch 13 to convert the medium-temperature and high-pressure gaseous refrigerant into medium-temperature and low-pressure gaseous refrigerant, and then flows into the condenser 112 to convert the medium-temperature and high-pressure gaseous refrigerant into low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 111 through the four-way valve 31. Further, the first throttling element 32 and the second throttling element 33 are of various types, which can be capillaries, or as in this embodiment, the first throttling element 32 and the second throttling element 33 are electronic expansion valves.

[0060] In one embodiment of the present invention, a stop valve 121 is provided on at least one of the gas side branch 12 and the liquid side branch 13. Thus, by setting the stop valve 121, the connection and disconnection of the gas side branch 12 and the liquid side branch 13 can be controlled so as to introduce the liquid refrigerant into the first indoor heat exchanger 2, or to introduce the gaseous refrigerant into the first indoor heat exchanger 2.

[0061] It should be noted that, since the gas side branch 12 is connected to the liquid side branch 13 through the first indoor heat exchanger 2, one of the gas side branch 12 and the liquid side branch 13 is provided with the stop valve 121, which can cut off the gas side branch 12 and the liquid side branch 13. However, if only one stop valve 121 is provided, the first indoor heat exchanger 2 will be connected to the gas side branch 12 or the branch, resulting in the refrigerant flowing into the first indoor heat exchanger 2 when cleaning is not required. For this reason, the gas side branch 12 and the liquid side branch 13 are both provided with the stop valve 121. Furthermore, when the refrigerant needs to circulate on the refrigerant circulation flow path 11, the stop valve 121 on the gas side branch 12 and the liquid side branch 13 are both closed to prevent the refrigerant from flowing into the first indoor heat exchanger 2. When the first indoor heat exchanger 2 and the second indoor heat exchanger 5 need to be frosted, the stop valve 121 on the gas side branch 12 is closed, and the stop valve 121 on the liquid side branch 13 is opened to allow liquid refrigerant to flow into the first indoor heat exchanger 2 to radiate cold to the second indoor heat exchanger 5, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted. When the first indoor heat exchanger 2 and the second indoor heat exchanger 5 need to be defrosted, the stop valve 121 on the gas side branch 12 is opened, and the stop valve 121 on the liquid side branch 13 is closed to allow gaseous refrigerant to flow into the first indoor heat exchanger 2 to radiate heat to the second indoor heat exchanger 5, so that the condensed frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 is melted.

[0062] In one embodiment of the present invention, a refrigerant radiator 114 is further provided on the refrigerant circulation flow path 11 to dissipate heat from the circuit board assembly. Thus, the refrigerant radiator 114 is provided to exchange heat with the circuit board assembly so as to improve the heat dissipation effect of the circuit board assembly, thereby enabling the air-conditioning system 100 to dissipate heat from the circuit board assembly.

[0063] In one embodiment of the present invention, the air conditioning system 100 further includes a second plate heat exchanger 115, the second plate heat exchanger 115 is partially connected to the refrigerant circulation flow path 11 and is located between the first throttling element 32 and the second throttling element 33, the refrigerant flow path 1 includes an injection enthalpy branch 14, one end of the injection enthalpy branch 14 is connected to the refrigerant circulation flow path 11 and is located between the second plate heat exchanger 115 and the second throttling element 33, and the other end flows through the second plate heat exchanger 115 and is connected to the At the spray enthalpy outlet of the compressor 111, the second plate heat exchanger 115 and the spray enthalpy branch 14 are arranged so that a part of the refrigerant can flow back to the compressor 111 through the second throttling element 33 and the first plate heat exchanger 113, and the other part of the refrigerant can be directly introduced into the compressor 111 through the second plate heat exchanger 115 and the spray enthalpy branch 14 to supplement the refrigerant and increase the exhaust volume of the compressor 111, so as to improve the power reduction problem of the compressor 111 caused by the outdoor temperature when the outdoor temperature is too low.

[0064] In one embodiment of the present invention, the water flow control component 6 includes a water pump 61 and a switch valve 62 arranged on the water flow path 4. In this way, by setting the water pump 61 and the switch valve 62, the water in the second indoor heat exchanger 5 can be drained before the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to prevent the water in the second indoor heat exchanger 5 from condensing into ice when frosting.

[0065] The present invention further provides an air conditioner, which includes the above-mentioned air conditioning system 100. It should be noted that the structure of the air conditioning system 100 in the air conditioner can refer to the embodiment of the above-mentioned air conditioning system 100, which will not be described in detail here; since the above-mentioned air conditioning system 100 is used in the air conditioner provided by the present invention, the embodiment of the air conditioner provided by the present invention includes all technical solutions of all embodiments of the above-mentioned air conditioning system 100, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0066] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the control device 3, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0067] like Figure 3 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a control program for the air conditioner.

[0068] exist Figure 3In the control device 3 shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the control device 3 of the present invention can be set in the control device 3, and the control device 3 calls the control program of the air conditioner stored in the memory 1005 through the processor 1001, and executes the control method of the air conditioner provided by the embodiment of the present invention.

[0069] exist Figure 3 In the control device shown, the processor 1001 calls the control program of the air conditioner stored in the memory 1005, and the control program of the air conditioner includes the following steps:

[0070] Get the self-cleaning mode selected by the user;

[0071] In the self-cleaning mode, the water flow control component 6 is controlled to operate so as to drain the water in the second indoor heat exchanger 5;

[0072] Controlling the cold flow control component 3 to operate according to the first refrigerant control state, so that the refrigerant can enter the first indoor heat exchanger 2 in liquid state and radiate cold energy to the second indoor heat exchanger 5, so as to form frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5;

[0073] After the frosting completion condition is met, the cold flow control component 3 and / or the water flow control component 6 are controlled to operate so as to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5;

[0074] After the defrosting completion condition is met, the self-cleaning mode is exited.

[0075] Furthermore, the refrigerant flow path 1 includes a refrigerant circulation flow path 11 and a liquid side branch 13, a compressor 111, a four-way valve 31, a condenser 112, a first throttling element 32 and a second throttling element 33 are provided on the refrigerant circulation flow path 11, and the cold flow control component 3 includes the four-way valve 31, the first throttling element 32 and the second throttling element 33;

[0076] The controlling the cold flow control component 3 to operate according to the first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger 2 in a liquid state includes:

[0077] The four-way valve 31 is controlled to switch the exhaust port of the compressor 111 to connect to the condenser 112, the first throttling element 32 is throttled, and the second throttling element 33 is closed, so that the refrigerant can enter the liquid side branch 13 in liquid state and enter into the first heat exchanger.

[0078] Further, the controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 includes:

[0079] The cold flow control component 3 is controlled to operate according to the second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger 2 in a gaseous state to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 .

[0080] Furthermore, the refrigerant flow path 1 includes a refrigerant circulation flow path 11 and a gas-side branch 12, a compressor 111, a four-way valve 31, a condenser 112, a first throttling element 32 and a second throttling element 33 are provided on the refrigerant circulation flow path 11, and the cold flow control component 3 includes the four-way valve 31, the first throttling element 32 and the second throttling element 33;

[0081] The controlling the cold flow control component 3 to operate according to the second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger 2 in a gaseous state includes:

[0082] The four-way valve 31 is controlled to switch the return air port of the compressor 111 to connect to the condenser 112, the first throttling element 32 is closed, and the second throttling element 33 is opened, so that the refrigerant can enter the gas side branch 12 in a gaseous state and enter into the first heat exchanger.

[0083] Furthermore, the water flow control component 6 includes a water pump 61 and a switch valve 62 arranged on the water flow path 4;

[0084] The controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 includes:

[0085] The water pump 61 is controlled to be turned on, and the switch valve 62 is controlled to be opened, so that water flows in the second indoor heat exchanger 5 to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 .

[0086] Furthermore, before controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5, the method further includes:

[0087] The cold flow control component 3 is controlled to be in the first refrigerant control state for a preset time to meet the frosting completion condition.

[0088] Furthermore, the water flow control component 6 includes a water pump 61 and a switch valve 62 arranged on the water flow path 4;

[0089] The controlling the water flow control component 6 to operate so as to drain the water in the second indoor heat exchanger 5 includes:

[0090] The water pump 61 is controlled to be turned off and the switch valve 62 is closed to drain the water in the second indoor heat exchanger 5 .

[0091] Based on the above hardware structure, the present invention proposes a control method for an air conditioner, wherein the control method for the air conditioner controls the water flow control component 6 and the cold flow control component 3 through the control device, so as to drain the water in the second indoor heat exchanger 5 before frosting the first indoor heat exchanger 2 and the second indoor heat exchanger 5, and input liquid refrigerant into the first indoor heat exchanger 2, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to self-clean the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0092] See also Figure 4 , Figure 4 The flowchart of the first embodiment of the air conditioner control method provided by the present invention is as follows. The air conditioner control method comprises the following steps:

[0093] S10: Obtaining a self-cleaning mode selected by a user;

[0094] It should be noted that there are many ways to obtain the user's selection, which may be obtained through a switch key or a remote controller, etc., and the present invention is not limited to this.

[0095] S20: in the self-cleaning mode, controlling the water flow control component 6 to operate so as to drain the water in the second indoor heat exchanger 5;

[0096] S30: Controlling the cold flow control component 3 to operate according to the first refrigerant control state, so that the refrigerant can enter the first indoor heat exchanger 2 in liquid state and radiate cold energy to the second indoor heat exchanger 5, so as to form frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5;

[0097] S40: after the frosting completion condition is met, controlling the cold flow control component 3 and / or the water flow control component 6 to operate, so as to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5;

[0098] S50: After the defrosting completion condition is met, exit the self-cleaning mode.

[0099] In this embodiment, after the air conditioner obtains the user's self-cleaning instruction, the control device first controls the water flow control component 6 to operate to drain the water in the second indoor heat exchanger 5, and then the control device controls the cold flow control component 3 to operate to introduce liquid refrigerant into the first indoor heat exchanger 2, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so that when the frost melts, the melted water can take away the dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5. After the defrosting is completed, the air conditioning system 100 Exit the self-cleaning mode. In this way, the water in the second indoor heat exchanger 5 is drained through the water flow control component 6 before the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, and the liquid refrigerant is introduced into the first indoor heat exchanger 2 through the cold flow control component 3, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, so as to self-clean the first indoor heat exchanger 2 and the second indoor heat exchanger 5, thereby solving the problem that the existing air-conditioning system 100 cannot be cleaned according to the self-cleaning of the fluorine system indoor unit.

[0100] Furthermore, the refrigerant flow path 1 includes a refrigerant circulation flow path 11 and a liquid side branch 13, a compressor 111, a four-way valve 31, a condenser 112, a first throttling element 32 and a second throttling element 33 are provided on the refrigerant circulation flow path 11, and the cold flow control component 3 includes the four-way valve 31, the first throttling element 32 and the second throttling element 33;

[0101] The controlling the cold flow control component 3 to operate according to the first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger 2 in a liquid state includes:

[0102] S31: Control the four-way valve 31 to switch the exhaust port of the compressor 111 to connect to the condenser 112, the first throttling element 32 throttles, and the second throttling element 33 closes, so that the refrigerant can enter the liquid side branch 13 in liquid state and enter into the first heat exchanger.

[0103] In this embodiment, the four-way valve 31 switches the exhaust hole of the compressor 111 to connect to the condenser 112, so that the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 111 flows into the condenser 112 through the four-way valve 31, so as to convert the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure gas-liquid mixed refrigerant. The first throttling element 32 is opened and the second throttling element 33 is closed, so that the refrigerant flowing out of the condenser 112 is converted into liquid refrigerant through the first throttling element 32, and the liquid refrigerant flows into the first indoor heat exchanger 2 through the liquid side branch 13. In this way, by controlling the cold flow control component 3, the liquid refrigerant is introduced into the first indoor heat exchanger 2, so that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted, thereby facilitating self-cleaning of the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0104] In order to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5, in one embodiment, controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 includes:

[0105] S41: Control the cold flow control component 3 to operate according to the second refrigerant control state, so that the refrigerant can enter the first indoor heat exchanger 2 in a gaseous state to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0106] In this embodiment, the operation of the cold retention control component is controlled to introduce high-temperature gaseous refrigerant into the first indoor heat exchanger 2, so that the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 is melted, so that the melted water can take away the dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5, thereby allowing the first indoor heat exchanger 2 and the second indoor heat exchanger 5 to complete self-cleaning.

[0107] It should be noted that there are many ways to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5. It can be defrosting by high-temperature gaseous refrigerant as in the above embodiment. Of course, when the ambient temperature is high, such as in summer, defrosting can also be performed by ambient air, etc. The present invention is not limited to this.

[0108] Furthermore, the refrigerant flow path 1 includes a refrigerant circulation flow path 11 and a gas-side branch 12, a compressor 111, a four-way valve 31, a condenser 112, a first throttling element 32 and a second throttling element 33 are provided on the refrigerant circulation flow path 11, and the cold flow control component 3 includes the four-way valve 31, the first throttling element 32 and the second throttling element 33;

[0109] The controlling the cold flow control component 3 to operate according to the second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger 2 in a gaseous state includes:

[0110] S411: Control the four-way valve 31 to switch the return air port of the compressor 111 to connect to the condenser 112, close the first throttling element 32, and open the second throttling element 33, so that the refrigerant can enter the gas side branch 12 in a gaseous state and enter the first heat exchanger.

[0111] In this embodiment, the four-way valve 31 switches the return air port of the compressor 111 to connect to the condenser 112, so that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 111 flows into the first indoor heat exchanger 2 through the air side branch 12 to radiate heat to the second indoor heat exchanger 5, so as to melt the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 into water, so as to remove dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0112] In another embodiment, the water flow control component 6 includes a water pump 61 and a switch valve 62 provided on the water flow path 4;

[0113] The controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 includes:

[0114] S42 : Control the water pump 61 to start, and the switch valve 62 to open, so that water flows in the second indoor heat exchanger 5 , so as to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5 .

[0115] In this embodiment, the switch valve 62 is opened and the water pump 61 is turned on to pass water to the second indoor heat exchanger 5 through the water flow path 4 to melt the frost on the first indoor heat exchanger 2 and the second indoor heat exchanger 5 into water, so as to remove dust and other stains on the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0116] In one embodiment of the present invention, before controlling the cold flow control component 3 and / or the water flow control component 6 to operate to defrost the first indoor heat exchanger 2 and the second indoor heat exchanger 5, the method further includes:

[0117] S60: Control the cold flow control component 3 to operate in the first refrigerant control state for a preset time to meet the frosting completion condition.

[0118] In this embodiment, the cold flow control component 3 is controlled to be in the first refrigerant control state for a preset time so as to extend the frost time of the first indoor heat exchanger 2 and the second indoor heat exchanger 5, thereby ensuring that the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are completely frosted, so as to avoid insufficient melt water during defrosting due to insufficient frost time, thereby affecting the self-cleaning effect of the first indoor heat exchanger 2 and the second indoor heat exchanger 5.

[0119] It can be understood that, in theory, the longer the preset time is, the better the frosting effect is. However, when the first indoor heat exchanger 2 and the second indoor heat exchanger 5 are frosted to a certain extent, the influence of the time on the frosting effect is smaller. For this reason, in this embodiment, the preset time is 10 minutes, which can not only ensure the frosting effect, but also reduce the power consumption of the air conditioner.

[0120] In order to prevent the second indoor heat exchanger 5 from being damaged by freezing when frosting occurs, in this embodiment, the water flow control component 6 includes a water pump 61 and a switch valve 62 provided on the water flow path 4;

[0121] The controlling the water flow control component 6 to operate so as to drain the water in the second indoor heat exchanger 5 includes:

[0122] S21: Control the water pump 61 to be turned off and the switch valve 62 to be closed to drain the water in the second indoor heat exchanger 5.

[0123] In this embodiment, the control device controls the water pump 61 and the switch valve 62 to close, so as to drain the water in the second indoor heat exchanger 5 before frosting the first indoor heat exchanger 2 and the second indoor heat exchanger 5, so as to drain the water in the second indoor heat exchanger 5 to prevent the second indoor heat exchanger 5 from being damaged by freezing when frosting.

[0124] It should be noted that the second indoor heat exchanger 2 is connected to a drain pipe and a drain valve provided on the drain pipe. When draining, the water pump 61 is controlled to be closed, the switch valve 62 is closed and the drain valve is opened, so that all the water in the second indoor heat exchanger 2 can be drained.

[0125] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that: A refrigerant flow path and a water flow path are formed on the air conditioning system, a cold flow control component and a first indoor heat exchanger are provided on the refrigerant flow path, and a water flow control component and a second indoor heat exchanger are provided on the water flow path; The air-conditioning system has a self-cleaning mode. In the self-cleaning mode, the water flow control component controls the flow of the water flow path to drain the water in the second indoor heat exchanger, and the cold flow control component controls the flow of the refrigerant flow path to allow the refrigerant to enter the first indoor heat exchanger in a liquid state and radiate cold to the second indoor heat exchanger.

2. The air conditioning system according to claim 1, characterized in that: The refrigerant flow path includes a refrigerant circulation flow path, a gas side branch and a liquid side branch; A compressor, a four-way valve, a condenser, a first throttling element, a second throttling element and a first plate heat exchanger are sequentially arranged on the refrigerant circulation flow path, the first plate heat exchanger has a first refrigerant port and a second refrigerant port, on the refrigerant circulation flow path, the first refrigerant port is located on a side of the second refrigerant port adjacent to the four-way valve, and the first plate heat exchanger is partially located on the water flow path; One end of the gas-side branch is connected to the first refrigerant port of the first plate heat exchanger, and the other end is connected to one end of the first indoor heat exchanger; One end of the liquid side branch is connected to the refrigerant circulation flow path and is located between the first throttling element and the second throttling element, and the other end is connected to the other end of the first indoor heat exchanger; The cold flow control component includes the four-way valve, the first throttling element, and the second throttling element.

3. The air conditioning system according to claim 2, characterized in that: A stop valve is provided on at least one of the gas side branch and the liquid side branch.

4. The air conditioning system according to claim 2, characterized in that: A refrigerant radiator is also provided on the refrigerant circulation flow path to dissipate heat from the circuit board assembly.

5. The air conditioning system according to claim 2, characterized in that: The air conditioning system further includes a second plate heat exchanger, the second plate heat exchanger is partially connected to the refrigerant circulation flow path and is located between the first throttling element and the second throttling element; The refrigerant flow path includes an enthalpy injection branch, one end of which is connected to the refrigerant circulation flow path and is located between the second plate heat exchanger and the second throttling element, and the other end flows through the second plate heat exchanger and is connected to the enthalpy injection port of the compressor.

6. The air conditioning system according to claim 1, characterized in that: The water flow control component includes a water pump and a switch valve arranged on the water flow path.

7. An air conditioner, characterized in that: Comprising the air conditioning system as claimed in any one of claims 1 to 6.

8. A method for controlling an air conditioner, based on the air conditioning system according to any one of claims 1 to 6, characterized in that: The control method of the air conditioner comprises the following steps: Get the self-cleaning mode selected by the user; In the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second indoor heat exchanger; Controlling the cold flow control component to operate according to a first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a liquid state and radiate cold energy to the second indoor heat exchanger to form frost on the first indoor heat exchanger and the second indoor heat exchanger; After the frosting completion condition is met, controlling the cold flow control component and / or the water flow control component to operate so as to defrost the first indoor heat exchanger and the second indoor heat exchanger; After the defrosting completion condition is met, the self-cleaning mode is exited.

9. The air conditioner control method according to claim 8, characterized in that: The refrigerant flow path includes a refrigerant circulation flow path and a liquid side branch, a compressor, a four-way valve, a condenser, a first throttling element and a second throttling element are arranged on the refrigerant circulation flow path, and the cold flow control component includes the four-way valve, the first throttling element and the second throttling element; The step of controlling the cold flow control component to operate in a first refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a liquid state includes: The four-way valve is controlled to switch the exhaust port of the compressor to connect to the condenser, the first throttling element is throttled, and the second throttling element is closed, so that the refrigerant can enter the liquid side branch in liquid state and enter into the first heat exchanger.

10. The air conditioner control method according to claim 8, characterized in that: The controlling the cold flow control component and / or the water flow control component to operate to defrost the first indoor heat exchanger and the second indoor heat exchanger includes: The cold flow control component is controlled to operate according to the second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a gaseous state to defrost the first indoor heat exchanger and the second indoor heat exchanger.

11. The air conditioner control method according to claim 10, characterized in that: The refrigerant flow path includes a refrigerant circulation flow path and a gas side branch, a compressor, a four-way valve, a condenser, a first throttling element and a second throttling element are arranged on the refrigerant circulation flow path, and the cold flow control component includes the four-way valve, the first throttling element and the second throttling element; The step of controlling the cold flow control component to operate in a second refrigerant control state so that the refrigerant can enter the first indoor heat exchanger in a gaseous state includes: The four-way valve is controlled to switch the return air port of the compressor to connect to the condenser, the first throttling element is closed, and the second throttling element is opened, so that the refrigerant can enter the gas side branch in a gaseous state and enter into the first heat exchanger.

12. The control method of the air conditioner according to claim 10, characterized in that: The water flow control component includes a water pump and a switch valve arranged on the water flow path; The controlling the cold flow control component and / or the water flow control component to operate to defrost the first indoor heat exchanger and the second indoor heat exchanger includes: The water pump is controlled to be turned on and the switch valve is opened so that water flows through the second indoor heat exchanger to defrost the first indoor heat exchanger and the second indoor heat exchanger.

13. The control method of the air conditioner according to claim 8, characterized in that: Before controlling the cold flow control component and / or the water flow control component to defrost the first indoor heat exchanger and the second indoor heat exchanger, the method further includes: The cold flow control component is controlled to be in the first refrigerant control state for a preset time to meet the frosting completion condition.

14. The control method of the air conditioner according to claim 8, characterized in that: The water flow control component includes a water pump and a switch valve arranged on the water flow path; The step of controlling the water flow control component to drain the water in the second indoor heat exchanger comprises: The water pump is controlled to be turned off and the switch valve is closed to drain the water in the second indoor heat exchanger.

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